And it turns out, the answer was in yet another of one of the seasons major mysteries.
Despite last weeks explosive ending, Memento Mori gets off to an almost jarringly subdued start.
Over coffee, Maggie and Mel tell Macy that Fiona, Charitys supposedly dead little sister, is alive.

Charmed — “Memento Mori” — Image Number: CMD116a_0018.jpg — Pictured (L-R): Sarah Jeffery as Maggie and Melonie Diaz as Mel — Photo: Colin Bentley/The CW — é 2019 The CW Network, LLC. All rights reserved.Colin Bentley/The CW
Macy wakes up in her bed surrounded by her sisters, Harry, and Charity.
The Elder tells Macy that she was summoned to the attic and when she arrived, Macy was unconscious.
He and Maggie celebrate the good news over brunch but are quickly interrupted by Lucy.

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Macys worried her demon side is causing blackouts and asks if there is anything they can do.
Charity poses an extreme temporary measure that would include binding her powers.
Harry, however, is dead against it because binding her powers risks losing the Power of Three forever.

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Despite not wanting to disrupt the Power of Three, Macy seems to be interested in hearing Charity out.
Maggie and Mel want to seek another way to help her and opt to seek Dr. Wagners help.
Meanwhile, Parkers tainted bellini catches up with him as he passes out in the Phi Delta bathroom.
Noting her extensive personal history with demons, shes never heard of it.
But Harry healed them at Charitys urging, so theyre no longer there.
When she pulls the needle out, Charity is there.
If only youd just left it alone, Charity says to Macy, before performing a spell on her.
She adds that her plan to bind Macys powers would have allowed her to destroy the memories forever.
Now that the plan has been foiled, she has no choice but to kill Macy.
She goes to use her powers, but Macys quicker and begins to strangle her.
Mel and Maggie frantically search the house for Macy and Harry, who is nowhere to be found.
In the attic, they find the summoning compass Charity gave to Macy but fail to summon the Elder.
Harry suddenly arrives, revealing he hasnt heard any of their calls for help.
The trio arrives just as Charity is about to unleash her powers on Macy.
Before Charity can say anything, Macy reveals that Charity was the one who killed Marisol.
Mel wastes no time kicking Charity in the face while Maggie rushes to Macy.
When theyre through with her, Charitys powers are gone.
In the attic, Macy explains to Maggie and Mel what she saw happen to their mom.
Charity reveals shed been spying on Marisol due to her ties to the Sarcana.
Marisol tells Charity about Macys death and revival due to necromancy, which horrifies her.
Suddenly, Fiona arrives and says she wants a word with her sister.
If Charity was expecting a warm reunion with little sister, shes sorely mistaken as a vengeful Fiona emerges.
Maggie visits Parker, who, thanks to Alastair and Lucy, has been infected with a demonic virus.
Maggie vows to find an alternative solution for Parker before its too late.